Alert archive / Iowa / Flash Flood Warnings in 2016

Flash Flood Warning 19, NWS Sioux Falls, SD

June 30, 2016Ida County, Woodbury County, Iowa

NWS Sioux Falls, SD issued this flash flood warning at Jun 30, 2016, 4:36 AM CDT for Ida County, Woodbury County, Iowa. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jun 30, 2016, 4:36 AM CDT (09:36 UTC)
Expired
Jun 30, 2016, 7:30 AM CDT
In force
3 hr
Issued by
NWS Sioux Falls, SD
Area
Storm-based polygon
Flood severity
None

Counties Ida County, IA, Woodbury County, IA

The radar

The Omaha radar (KOAX), 129 km from the middle of the area, began a volume at 09:37 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 9.6 hours before the alert went out and 129 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Omaha, NE at 00:00Z on 2016-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2339 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 00:00Z on 2016-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
2339 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
1166 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
1.2
Supercell composite
10.0

Open this sounding in Storm Lab

The text

As transmitted.

826 
WGUS53 KFSD 300936
FFWFSD
IAC093-193-301230-
/O.NEW.KFSD.FF.W.0019.160630T0936Z-160630T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
436 AM CDT THU JUN 30 2016

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  IDA COUNTY IN WEST CENTRAL IOWA...
  EASTERN WOODBURY COUNTY IN WEST CENTRAL IOWA...

* UNTIL 730 AM CDT

* AT 435 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
  ADDITIONAL RAINFALL OF 1 TO 3 INCHES IS POSSIBLE.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  IDA GROVE...HOLSTEIN...CORRECTIONVILLE...BATTLE CREEK...ANTHON...
  CUSHING AND ARTHUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 4227 9589 4255 9585 4244 9533 4225 9532
      4221 9532

$$

WEISSER
2 follow-up statements
355 
WGUS73 KFSD 301106
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
606 AM CDT THU JUN 30 2016

IAC093-193-301230-
/O.CON.KFSD.FF.W.0019.000000T0000Z-160630T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
IDA IA-WOODBURY IA-
606 AM CDT THU JUN 30 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 AM CDT FOR IDA
AND EASTERN WOODBURY COUNTIES...

AT 605 AM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. A RADAR ESTIMATED 4.5 INCHES OF
RAIN HAVE ALREADY FALLEN. FLASH FLOODING IS OCCURRING OR EXPECTED TO
BEGIN SHORTLY.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
IDA GROVE...HOLSTEIN...CORRECTIONVILLE...BATTLE CREEK...ANTHON...
CUSHING AND ARTHUR.

ADDITIONAL RAINFALL AMOUNTS OF A QUARTER TO A HALF AN INCH ARE
POSSIBLE IN THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 4227 9589 4255 9585 4244 9533 4225 9532
      4221 9532

$$

WEISSER
709 
WGUS73 KFSD 301228
FFSFSD

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
728 AM CDT THU JUN 30 2016

IAC093-193-301238-
/O.EXP.KFSD.FF.W.0019.000000T0000Z-160630T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
IDA IA-WOODBURY IA-
728 AM CDT THU JUN 30 2016

...THE FLASH FLOOD WARNING FOR IDA AND EASTERN WOODBURY COUNTIES WILL
EXPIRE AT 730 AM CDT...

THE HEAVY RAIN HAS ENDED. FLOODING IS NO LONGER EXPECTED TO POSE A
THREAT. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 4227 9589 4255 9585 4244 9533 4225 9532
      4221 9532

$$

MJF

Nearby

Flash Flood Warnings in Iowa, 2016Every flash flood warning in 2016

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.